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  • Title: Interplay of sino-aortic reflexes and haemodynamic changes during natural sleep in the cat.
    Author: Baccelli G, Albertini R, Mancia G, Zanchetti A.
    Journal: Clin Sci Mol Med Suppl; 1976 Dec; 3():373s-375s. PubMed ID: 1071649.
    Abstract:
    1. When the sino-aortic afferents are intact, desynchronized sleep causes a small decrease in the blood pressure, a vasodilation in the mesenteric and renal beds, and a vasoconstriction in the external iliac bed. 2. After sino-aortic deafferentation desynchronized sleep causes a larger fall in the blood pressure, a greater vasodilatation in the mesenteric and renal beds, and a vasodilatation replaces the vasoconstriction in the external iliac bed. 3. The sino-aortic reflexes play an active role in controlling circulation during desynchronized sleep by opposing the centrally induced reduction in adrenergic sympathetic tone. This effect of sino-aortic reflexes is similar on both visceral and muscular vessels. In addition, the muscular bed, but not the visceral one, is regulated by a spinal reflex vasoconstriction mechanism which is apparent only when the sino-aortic reflexes are intact.
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